Let-off device for looms.



Patented May |4, lem.

F. WUUD & W. HINCHLIFFE.

LET-oFF nEvl'cE Fon' Looms.

[Application led Jan. 28, 1901 IIIIIIIII. l.

III-III M W. WM,

rire A'Tns ATENT errent FRANK WOOD AND WILLIAM HINCHLIFFE, OFCUMBERLAND, RHODE ISLA-ND.

LET-OFF DEVICE FOR LOOIVlS.

SPECIFICATION formingpart of Letters Patent No. 674,149, dated May 14.,1901. Application filed January 28, 1901, Serial No. 45,080. Lllomodel.)

To ctZZ whom t may concern.:

Be it known that We,FRANK WOOD and WIL- LIAM HINCHLIFFE, citizens of theUnited States, residing at Cumberland, in the county of Providence andState of Rhode Island,- havevr invented certain new andusefullmprovements in Slackening Devices for Doup-Weaving, of which thefollowing is a specification, reference being had therein to theaccompanying drawings.

Like letters indicate like parts.

Figure l is a View, partly in side elevation and partly in verticalsection, of such parts of a tape-loom as are necessary to illustrate ourinvention and its uses. Fig. 2 is a side elevation of ourimprovedslackening devices. Fig. 3 is a top plan view of the same, together witha warp-beam and a friction device for the latter. Figs. 4 and 5 aredetail views. Fig. 6 shows the linished tape which is a product of saidloom.

Our invention relates to looms for doupweaving, and especially to theslackening means for regulating the feed and tension of thedoup-threads.

-It consists of the novel construction and combination of the severalelements hereinafter particularly described, as specifically set forthin the claims.

In the drawings, A B are portions of the frame of the loom, C C C thewhip-rolls, D D the lease-rods, E E E the harnesses, F the lay, G thereed, H the breast-beam, I the sand-roll, and J the weight-roll, all ofthe usual construction.

K K are standards fastened at their upper and lower ends to the frame BA, as shown in Fig. l, and provided with the brackets a, b, and c. Thewarp beam or roller L is mounted by its journals d in the brackets a. Afriction cord or band e, fastened at one end to an eye fon the standardK, passes overone of the flanges of the warp beam or roller L, in acircumferential groove thereof, and its opposite end is fastened to aneyeg of a rod M. A lever N, pivoted to the standard'K at h, extends tothe rear and has a rollerz' mountedrotatably thereon. On the end of thelever N is theweight O.` The warp :l: passes from the roller L up overthe rod M, down under the roller i, up over the whip-roll O, over thelease-rods D D, and through the harness E E E and reed G. The Weight ofthe rod M and also the downward pull of the warp passing over said rodgive the cord or band e a sufcient friction upon the warp-roller L toregulate properly the paying out of the warp a; therefrom.

In the bracket b of the standards K K is mounted the warp beam or rollerP of doup thread by thejournals j thereof. Thisroller `P has thecircular flanges 7e 7c', the former, of

which is cireumferentially grooved, as seen in Fig. 3. In the standardsK K are studpins Z Z, on which are mounted the slackeners mmtheshapes ofwhich are fullyillustrated in Figs. 2 and 3. The slackener 'm has a benteye, Whose shape is shown in Fig. 4., and the slackenern has a benteye,Whose shape is shown in Fig. 5 Said slackeners are mounted by their saideyes, respectively, upon the stud-pins Z Z, as seen in Figs. 2 and 3. Afriction cord or band 0, fastened at one end to the eye 1o on thestandard K, (see Fig. 1,) passes over the roller P, and its opposite endis fastened to the cross-piece of the 'upper slackener fm.'

The slaekener n is bent, as .shown in Figs. l and 2, and on itscross-piece is a hook g, on which are weights r. The doup-thread ypasses from the roller P up over the crossbar of the slackener m anddown under the cross-bar of the slackener n, thence up over thewhip-roll O and lease-rods D D, and through the harnesses EE E and reedGM, In like manner the Vroller Q is mounted in the brackets c of thestandards K K', and the doupfthread .z therefrom passes over the whiproll C", lease-rods DD, and through the harnesses E E E and reed G, asshown.

We do not deem it necessaryY to describe the process of doup-weaving, asthe saine is common and well known, and'our present invention relatesentirely to the slackening devices m n. In Figs. 1 and 2 theseslackeners m'n are shown in their vusual position. The draft of thedoup-threadjy is caused by the Weights r upon the hook q, hung upon thecross-bar of the slackener n, and this draft of the doup-thread inpassing over the crossbar of the slackener rm, causes the frictioncord 0to draw more tightly on the roller P,

and so to prevent over-rotation thereof. When IOO by the jacquard orother mechanism con trolling the pattern devices there required aslackening of the (loup-threads, the slackener n moves from the positionshown in Fig. 2 in solid lines to the position shown in said figure indotted lines, being' so moved by that portion of the (loup-thread y]which is above and beyond the cross-bar of the slackener n. The thread ywhen the slackener n is in its elevated position lies in the directionindicated in Fig. 2 by the dotted line y'. In this direction it is seenthat the thread no longer pulls down the slackener m, and therefore thefriction-cord o does not bind on the flange of the roller P. The resultis that said doupthread is loose and allows the doupiug movement in theharnesses, whereby the figure or pattern formed of the loup-thread iswoven into the fabric. The return of the patternforming devices to theirprevious position allows the weights r to draw down the slackeuer 'n tothe position indicated in Fig. 2 in solid lines.

In Fig. 6 is shown the patterned fabric, in which the doup-threads arewoven into the desired design.

This mechanism is adapted to be used in the weaving not only of iiguredtape, but also of leno and other gauze fabrics.

The slackening devices heretofore employed for these purposes have beenplaced on the upper portions of the loom, where they have been much inthe way, and they have been comparatively heavy, extensive, andcumbersome. Our improved slackening devices occupybut little space, donot interfere with access to the loom, and being` of such light weightare extremely sensitive to the draft of the pattern forming1 mechanism,while they aord to each individual warpbeam of (loup-thread preciselythat degree of friction which it needs, without any excess thereof orany communication from one to another.

We claim as a novel and useful invention and desire to secure by LettersPatent- 1. The improved slackeuing device for (loup-weaving;` hereindescribed, consisting` of the combination of a hanged, rotatablewarproller, properly mounted, an upper Mslackening-lever consisting of abar with two parallel bent ends which terminate each with an eye,

two studs mounted in fixed supports in the same vertical line with thejournals of said warren-roller but below the same, on which studs,respectively, said eyes of the upper slackening-lever are looselymounted, a friction-cord passi ng' over the fiange ot' said rollel` andhaving` one end fastened to a iixed support and the other end fastenedto the upper slackening-lever, a lower slackeningdever consisting` of abar with two bent ends parallel with each other terminating each with aneye, which eyes, respectively, are loosely mounted on said studs, aweight hung upon the bar of the lower slackening-lever, a doupthreadwound upon said roller and passing thence over the bar of the upperslackeninglever and under the bar of the lower slacliening-lever, andmeans adapted to draw said thread from the warp-roller si'ibstantiallyas specified.

2. The improved slackening device for doup-weaving, consisting of thecombination of a hanged, rotatable warp-roller, properly mounted, anupper slackening-lever consisting` of a bar with two parallel bent endswhich terminate each with an eye, two studs mounted in fixed supports inthe same vertical line with the journals of said warp-roller but belowthe same, on which studs, respectively, said eyes of the upperslaclzening-lever are loosely mounted, a friction-cord passing over theflange of said roller and having one end fastened to a fixed support andthe other end fastened to the upper slackening-lever,a lowerslaclteningdever consisting of a bar with two bent ends parallel witheach other terminating each with an eye, which eyes, respectively, areloosely mounted on said studs, a doupthread wound upon said roller andpassing thence over the bar of the upper slackeninglever and under thebar of the lower slackening-lever, and means adapted to draw said threadfrom the warp-roller, substantially as described.

In testimony whereof We affix our signatures in presence of twowitnesses.

FRANK IVOOD. WILLIAM I'IINCIILIFFE.

Witnesses:

W. E. KEACH, M. INI. BROWN.

